Hydraulic metal-press.



J. T. J. SEIPERT.

HYDRAULIG METAL PRESS. I

APPLICATION FILED NOV.16, 1909.

974, 1 95. Patented Nov. 1, 1910.

UNITED STATES Parana OFFICE.

JOI-IANN THEODOR J' OSEPI-I. SEIFERT, OF DRESDEN-NEUSTADT, GERMANY, ASSIGNOR T NEUE BERLINER MESSINGWERKE WILI-IELM BORCHERT, J R., OF BERLIN, GER- MANY, A FIRM.

HYDRAULIC METAL-PRESS.

Be it known that I, J OHANN Tnnonon Jo- SEPH Sumner, workmaster, a subject of the King of Prussia, and resident of lVildermannstrasse 53, Dresden-Neustadt, Germany,

have invented certain new and useful Improvements in and Relating to Hydraulic Metal-Presses, of which the following is a specification.

' This invention relates to improvements in hydraulic presses for the manufacture of I tubes or rods from hollow or solid blocks.

In presses of this kind for practical reasons it is not possible to drive the press plunger sufliciently forward to enable all the material to be forced out of the receptacle. Owing to this a dead-head remains on the pressed tube or rod and this has subsequently to be vcut away for the purpose of removing the work from the die. In order to render this cutting possible it has heretofore been usual to remove the die which is centrally fixed to the receptacle itself from this receptacle together with the work last pressed. After tne' removal of the dead-head the die is as inxinsertcd and fixed in the receptacle.

material or the like had penetrated the centering such foreign bodies frequently caused the centering to be entirely inaccurate so that numerous waster-s were formed.

The present invention has for its object to obviate these defects and in accordance therewith the die is not centrally lixed on the receptacle but on a separate auxiliary hydraulic piston open at its rear end and by means of which it is pressed against the receptacle. With this arrangement the die need not be removed from its fitting after the pressing operation but the auxiliary pis-.

ton and the-die are merely withdrawn from the receptacle and the work removed after the deadh'ead has bcencut away, where Specification of Letters Patent.

'tll6 .1)ifSSl1I'B: surface thereby rendering it be very difiicult to perform.

Patented Nov. 1, 1910.

Application'flled November 16, 1909. Serial No. 528,407.

To allivhom it may concern:

upon the die and the receptacle are again united. V

It'is truethatit has already been proposed to severt'he deadhead' in the receptacle" itself bynieans of a severing-ring fixed to unnecessary to remove the die each time; but this manner of procedure has proved to be impractical, and even if it were practical would present the defect that the removal of the deadhead from the rece tacle would u the other hand in accordance with the improved deyice the mechanical severing of the deadhead may be very readily effected for the reason that after every stroke of the press the die is lifted from the receptacle so that the severed deadhead is allowed to .fall freely. i

In accordance with what has been stated above the invention mainlyconsists in the combination of two features that is to say the hydraulically displaced counter-piston and the ejection of the work on the side of the hollow auxiliary piston opposite to the main piston for which purpose the auxiliary piston must be open. The combinationv of these two features results in a more. compact and reliable construction of the. press,

reduces the labor necessary and economizes the consumption of water under pressure; The new device has the further arrangement that the receptor, independently from the main piston, is movable to th eextent of the depth of the receiving chamber and is provided with a corresponding hydraulic auxiliary feeding mechanism. The hydraulic auxiliary feeding mechanism in itself is known, but in the oldermachines was con piston, consists of making possible an easy exchange of the press-rings and press s it without throwing off the matrix, andrur-' ther, creating optionally a large i'intermediate space between the main piston and the receptor, or between the receptor and thematrix, which is important-not alone for the optional feeding of the receptor from i of the block 22, to be inserted whereupon the the side of the piston or the matrix, but

also for the making of repairs and other work on the machine. Furthermore, the hydraulic auxiliary feeding mechanism of the receptor, in the new press, makes it possible after the insertion of the piece to be worked from the side of the piston while the main piston of the press remains stationary, to move the receptor so far against the said piston that the pressure surface touches the block on the machine, after which-and not sooner-the press piston is started. has the advantage that much less press-water is consumed than if the main piston had also to perform the firstinactive part of the stroke. Of course, the new machine can also work in such a manner that the receptor, in its end position toward the side of the piston; remains permanently stationary v and the matrix is moved only once, backward and forward at each operation, by means of its auxiliary piston.

An embodiment of the invention is illustrated by Way of example diagrammatically in longitudinal section in the accompanying drawing.

The press cylinder is marked a. In it the uide mandrel b is fixed by means of a colar 0 and Wedge or key 01. The guide mandrel b carries at its end the caliber mandrel e and serves as a central guide for the press piston f.

The stationary cross head It is connected by means of longitudinal tie rods 9 with the stationary cylinder a. is guided on these rods 9 and is connected by means of the connecting rods 7r with the pistons Z of smaller auxiliary hydraulic cylinders m provided on the cylinder casting a. The perforated block a is inserted in the bore of the receptacle z for the purpose of forming a tube for example. In the cross head it an auxiliary hydraulic c linder 0 is provided, the die 9 being centrally fitted in its hollow piston 32. The front end of the die is conically constructed and when the die is displaced toward the receptacle by the piston 79 it enters a,corresponding conical cavity in the receptacle thereby forming a good and central joint.

. An auxiliary hydraulic cylinder 1 is fixed to the cross head it and is provided with a iston s which carries at its lower end anife t the cutting edge of which lies in the same plane as the end face of the die. This knife serves to sever the dead-head in the manner hereinafter explained. The pres suresurface of the main piston is marked a.

The apparatus operates in the following manner :-Vith the press piston f drawn back the receptacle i is moved away from it to such an extent that the end of the caliber mandrel c is distant from the mouth of the receptaclesomewhat more than the height This The receptacle 5 latter is introduced into the bore in the receptacle. At this stage the receptacle is moved forward by means of the auxiliary piston Z until the pressing annular face '11 of the main piston contacts with the end face of the block n. Simultaneously or successively thereto pressure is supplied to the piston which moves in the left hand direction so that at the end of the stroke the die g bears firmly against the receptacle as shown in the position of the machine represented .in the drawing. The conduits leading to the auxiliary cylinders m and 0 are then closed and the piston f is pressed forward against the block 72. whereby the pressed tube passes through the Hollow piston 32.

When the pircssing operation is completed the piston p of the cylinder 0 and with it the die 9 is displaced from the receptacle 71. As soon as this has taken place pressure is supplied to the auxiliary cylinder 9' resulting iii a downward movement of the piston s and knife t and the consequent severing of the deadhead. The finished work can then he completely withdrawn from the die and the hollow piston;o. When the pistons f Z 39 and 8, move back the machine is ready for a further pressing operation.

With the arrangement of the machine here illustrated the press mandrel e is both interchangeable and ver easy of access.

What I claim and desire to secure by Letters Patent of the United States isz- 1. In a hydraulic press for the manufacture of tubes or rods from hollow or solid blocks, a main pressure cylinder and piston and an auxiliary cylinder and piston; a die supported by the iston of said auxiliary cy inder, raid auxl iary piston at both ends withthe axis thereof located in alinement with the axle of the iston of the main pressure cylinder in or er that the finished article may be ejected through the, hollow piston of said auxiliary cylinder.

2. .A hydraulic press of the character indicated provided with a press cylinder and an auxiliary cylinder having a hollow piston; together with a die held in operative posh tion within such hollow piston.

press for the manufarttur e of tubes or rods from hollow or solid blacks embracing a main piston and an auxiliary tubular piston; in combination with a die located within said tubular piston, and a cutter operatively connected with means for causing it to sever the deadhead" from the work.

l. A hydraulic press of the character indicated mixiliary cylinder, and a bloat; holding receptacle, said block holding receptacle being operatively 'connected with secondary or additional cylinders.

5. A hydraulic press of the charzng'i'rr indi- 3. A hydraulic being open provided with a press cylinder, an

sic

operzitively connected with secondary hydraulic cylinders, the effective length of the cated provided with .a iress cylinder, an auxiliary cylinder, and a block holding receptacle, said block holding receptacle being In testimony whereof I have hereunto set my hand in presence of two subscribing me nesses this second day of November 1909.

JOHANN THEODOR JOSEPH SEIFERT.

stroke of the pistons of which is the same \Vitnesses:

or substantially the same-as the depth of HEnRY HAsPEn, the receptacle. WOLDEMAR HAUPT. 

